Comminuting apparatus



March 24,1925. 1,530,615

E. POHL v COMMINUTING APPARATUS Filed March l 0 1924 s Sheets-Sheet 1-ATTORNEY E. POHL COMMINUTING APPARATUS 'Fi1ed March 10, 1924 3 sheotashoot 5 March 24,1925. r 1,536,615

ATTORNEY hinted Marie, 1925.

UNITED STATES PATENT OFFICE.

EMI P0111... or AUSTIN, PENNSYLVAnIa GO'MMINUTING APPARATUS.

Application filed March -10, 1924. Serial no. 698,020. 1

useful Improvements in Connninuting Apparatus, of which the following isa speci fication. 4 I

My invention has reference :to the manufacture of paper, cardboard, and"the like, and consists in a new apparatus forcomurinuting wasteparticles of wood, such as wood-chips, for utilizing it as a fillingmaterial inthe manufacture of iia-per, cardboard and the like. My newapparatus is designed to effectively disintegrate the material undertreatment, and is simple both in construction and operation.

In the drawing herewith to illustrate .nriy

invention, Fig. 1 is a side elevationpartly in section of the newapparatus, the upper portion of the fixed standards being broken away,-Fig. 2 is a fragmentary view seen from the left in Fig. 1; Fig. 3 is asimilar view seen from the right- :in Fig. 1; Fig. 4 is a top View; Fig.5 is a sectional view along line 55 in ig. 2, and Fig. 6 is a sectionalview along line 6 6M Fig. 2.

In describing my invention more in detail, I shallfirst describe theapparatus for carrying out my new process, with reference to thedrawings.

In lined standards 1, 2 are provided a plurality of sets of cooperatingrollers, l, 11, III, IV iireferably made of stone. These rollers howevercan also be made of artificial stone, emery, basalt lava, or of metal,such as steel, hard bronze, cast steel, or any other suitable hardmaterial. Each set of rollers comprises a large roller 3 and two smallerrollers 4,5 adapted to cooperate with 3. The diameter of the largeroller 3 relative to the diameter of the smaller rollers 4, 5 ispreferably at the ratio of 2 :1, While the width of the rollers is aboutthree feet, more or less. The large rollers 3 re volve at slow speed,while the smaller rollers 4, 5, revolve at high speed. The large rollers3 of all the sets-are rotatably journalled in fixed bearings 6, whilethe smaller rollers 4, 5 are rotatably journalled in adjustable bearings7, the bearings 7 bemg mounted on supports 8 and under the control ofhelical springs 9, making the bearings 7 yielding. The large rollers3are set in slow rotation through a set of mesh ing gears shown in Figs.2 and 3 and in broken lines also in the lower half of Fig. 1. ,Thedriving pinion 10 is mounted on a shaft 11 (Fig. 4-) carrying a fast andloose pulley 12 and 13 respectively over which passes a belt 14. Thisdriving pinion 10 directly meshes with the gear 15 mounted on theprojecting outer'end of the axisof.

the bottom roller 3 (Fig. 1). The gear 15 in turn meshes through anintermediate gear 16 with thegear 17 on the axis of the next succeedinglargcroller 3, and so forth, as-clearly shown in Figs. 13. The small-errollers 4, 5 are rotated at-a much greater speed than the large rollers3. To this end, the rollers 4, 5 are driven from a large pulley (notshown) by means of a belt 18 19, 20 mounted on the axes 21, 9.2 of thesmaller rollers 4, 5. Also, a tensioning roller 23 is provided to keepthe belt 18 taut and in frictional engagement with the said smallpulleys mounted on the: axes of the smaller rollers 4, 5.

At the top of the fixed standards 1, 2 provided the feeding table 24,extending across the entire width of the rollers, and having atransverse slot extending projections 26, 9.7 of the feeding table reachbetween the uppermost jlarge roller 3 and the top-roller 4 of theuppermost set of smaller rollers 4, 5 forming a feeding chute. Betweenthe top set I of rollersand the next lower set 11 of rollers The rollersused are preferably made of a hard stone, either natural or artificial,or they may be made of emery, or a mixture 25. Downward ly Fi 5 which)asses ar und smalloulle 's the apparatus shortly suitable agitatingmeans, the material mixed with a sufficient amount of water flows ontothe slotted feeding table 24 which allows the material to pass throughthe above mentioned fee-din chute to reach the first set (I) of rollers.I-Iere, the material is squeezed under yieldingpressure between and pastthe slowly rotating large roller 3 and thesmaller rollers 4, 5 revolvingat a higher rate of speed than the roller 3. From the first set I ofrollers, the material passes down through the next chute to the secondset II of rollers where it-is again subjected to thecommimiting combinedaction of the large rollers 3 and the opposing, rapidly re volvingsmaller rollers 4, 5, and so forth, until the material reaches theoutlet or discharge chute 30 below the bottom set IV of rollers, throughwhich chute the material passes on to screenstobe subjected to furthertreatment, either wet or dry.

The position of the smaller rollers l, 5 relatively to the largerrollers 3 can be exactly adjusted, an abutment 31 being provided todetermine the extreme forward position of the rollers 4:, 5 toward thelarge roller 3. Because of the provision of the helical springs, thesmaller rollers are yielding. The rotation of the rollers is indicatedby the arrows in Fig. 1, from which it appears that the smaller rollersrotate in opposite direction to their roller. p

The smaller rollers are held under yielding pressure being under thecontrol of spring 9. The one end each. spring abuts against anadjustable slide block 32, which an be moved to and fro on the support 8corresponding larger and is held in its adjusted position by screws 33.

I claim as my invention:

1. In connninuting apparatus, the combi nation of a plurality ofsuperposed sets of hard smooth rollers rotatably j ournalled in fixedstandards, each set comprising a large roller mounted in fixed bearingsand two smaller rollers mounted in movable bearings cooperating withsaid large roller,

means for rotating all said large rollers of the sets at a uniform slowspeed in the same direction by means of a train of gears with idlergears interposed between the gears upon the shafts of said largerollers, means for driving the smaller rollers in each set at a higheruniform speed by independent driving means and means for feeding andguiding the material to be treated between the sets and also between thetwo smaller rollers in each set.

2. Incomminuting. a1:)paratus, the combination of a plurality ofsuperposed sets of hard smooth rollers rotatably journalled in fixedstandards, each, set comprising a large roller mounted in fixed bearingsand two smaller rollers mounted in movable bearings cooperating withsaid large roller,

larger roller in each set, means for holding.

the movable bearings under a yielding pressure relative to the fixedbearings, and means for feeding and guiding the material to be treatedbetween the sets and also between the two smaller rollers in each set.

In testimony whereof I aflix my signature.

EMIL POHL.

